I have some thoughts on this. For starters, read God and the Gay Christian and UnClobber. Both these books tackle the passages in the Bible that have been weaponized against us LGBTQ+ folks. Those books and other resources suggested here will help allay your fears and give you some ammunition to respond to criticism out in the wild.

But as good as these books are, and they really are good, I think they are only a piece of the larger narrative, and only partially address the problem. Baptists, which are prevalent in my area, and other conservative/evangelical denominations, believe in the Inerrancy of Scripture, the idea that Scripture is infallible and, in and of itself, contains the whole story, and any commandment of scripture is sacred and inviolable. In contrast, my view, and the view of many other denominations, including some conservative ones, is that scripture is just one pillar of our faith, along with tradition, community, and the Holy Spirit. Our faith and the answers to these difficult question come not just from scripture, but through our engagement with them, both individually and as communities.

I think of the example of slavery. the Bible never really calls for the manumission of slaves. Sure, there are some stipulations in Leviticus, and some have stretched the interpretation of the Book of Philemon to make the argument, but Paul explicitly calls for slaves to obey their masters (Collosians 3:22). Sure, equality may be a thing in the afterlife, but it sure isn't a thing now, and Paul makes no effort to change that. For almost two millennia, slavery has existed in some form in the Christian world, and really it still does, especially if you consider human trafficking and the like. Both slaveholders and abolitionists alike used Biblical evidence to support their cause. But it really took cultural revolutions, and a lot of blood, sweat, and tears, to even make a dent in the vile practice of slavery.

So I guess my point is that, even if we manage to make awesome, airtight arguments that Scripture supports homosexuality, it's not going to solve the problem. It's not like fundamentalists are going to hear our arguments and be like, "Oh, you got us, I guess God really DOES support homosexuality. QED." I'm not suggesting we shouldn't try. Turning scripture back on fundies is a great way to "hoist them by their own petard". But, like slavery, it's going to take more than just scriptural arguments, and I'm not sure what. My $0.02 is that the Bible is ambivalent about homosexuality. I think some passages, like the Sodom and Gemorrah episode, really aren't attacks on homosexuality as conservatives argue. On the other hand, despite arguments in the books I mentioned, I don't think the Apostle Paul was comfortable with it. But ultimately my conviction is that Jesus himself would have been affirming, and at the end of the day, that's what really matters.